deps: update dependency com.google.cloud:google-cloud-shared-dependen…

…cies to v0.21.1 (#521)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud:google-cloud-shared-dependencies](https://github.com/googleapis/java-shared-dependencies) | `0.21.0` -> `0.21.1` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-shared-dependencies/0.21.1/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-shared-dependencies/0.21.1/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-shared-dependencies/0.21.1/compatibility-slim/0.21.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-shared-dependencies/0.21.1/confidence-slim/0.21.0)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

<details>
<summary>googleapis/java-shared-dependencies</summary>

### [`v0.21.1`](https://github.com/googleapis/java-shared-dependencies/blob/master/CHANGELOG.md#&#8203;0211-httpswwwgithubcomgoogleapisjava-shared-dependenciescompare0210v0211-2021-04-19)

[Compare Source](https://github.com/googleapis/java-shared-dependencies/compare/v0.21.0...v0.21.1)

</details>

---

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pom.xml

@@ -95,7 +95,7 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-shared-dependencies</artifactId>
-        <version>0.21.0</version>
+        <version>0.21.1</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>